Multi-effect evaporation system for recovering alkali metal through graded concentration of waste liquid

Abstract

The invention discloses a multi-effect evaporation system for recovering alkali metal through waste liquid graded concentration, and relates to the technical field of chemical engineering and environmental protection, the multi-effect evaporation system comprises a waste liquid storage tank, a delivery pump, three evaporators, an incinerator, a waste heat boiler, an induced draft fan and a treatment tower, and through a treatment mechanism and an anti-blocking mechanism, operation of the two mechanisms can be driven at the same time, and the treatment efficiency is improved. The spraying frame can be driven to uniformly spray the spraying liquid to be in contact with flue gas, the residence time of the flue gas can be prolonged, so that the flue gas can be fully contacted and reacted with the spraying liquid, the flue gas treatment effect is improved, and the crankshaft is linked with the motor to drive the piston to move so as to convey the spraying liquid; meanwhile, the reciprocating screw rod is driven to rotate, so that the cleaning brush is driven to clean the filter screen I, and conveyed water is matched to wash the filter screen I, so that the cleaning effect is improved, and the filter screen I is prevented from being blocked to influence the filtering effect; and through the one-way valve assembly, water can be gradually accumulated in the collecting box, so that the sealing block is separated from the fixing ring, the water flows back into the water tank to be recycled, and water sources are saved.

Description

Technical Field

[0001] The invention relates to the technical fields of chemical industry and environmental protection, and in particular to a multi-effect evaporation system for recycling alkali metals by graded concentration of waste liquid. Background Art

[0002] The technology of recovering alkali metals from waste liquid by concentration mainly involves the multiple-effect evaporation system, which is a chemical and environmental treatment technology designed to recover alkali metals from waste liquid through the process of evaporation and concentration.

[0003] For example, the patent with announcement number CN2745917Y, a multi-effect evaporation system for waste liquid concentration and recovery of alkali metals, belongs to the field of chemical, environmental protection and other treatment technologies, including a waste liquid storage tank, a delivery pump, an evaporator, and is connected to an incinerator, a waste heat boiler, an induced draft fan, a chimney and a smoke and air duct. The evaporator is characterized in that 3 to 5 steam-falling film evaporators or vacuum crystallizers are connected in series. The utility model can solve the problems of coking and slagging of the incinerator, and at the same time remove alkali metal salts and alkaline earth metal salts through the evaporation and crystallization process, which can realize continuous incineration treatment of salt-containing organic waste liquid, and eliminate the need for complex equipment and reagents, reduce costs, and improve treatment efficiency.

[0004] The incinerator used in the process of waste liquid concentration and recovery of alkali metals will produce a large amount of combustion flue gas during the incineration process. The composition of these flue gases is relatively complex, mainly including smoke, acidic gases, heavy metals and dioxins, etc. If they are directly discharged without treatment, they will pollute the surrounding environment. Therefore, some flue gas treatment equipment is currently used to treat them before discharging them. The traditional flue gas treatment structure usually directly passes the flue gas into the inner wall of the equipment and sprays it with spray liquid to treat it, but the flue gas flows at a fast speed, so its residence time in the equipment is short, and the purification effect of the flue gas is relatively poor; in addition, when the flue gas enters the equipment, it is usually filtered by a filter, but it lacks a structure to prevent clogging, so it is easy to get clogged after a period of use, affecting the filtration effect, and it is inconvenient to use. Summary of the invention

[0005] The object of the present invention is to provide a multiple-effect evaporation system for waste liquid graded concentration and recovery of alkali metals, so as to solve the problems raised in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-effect evaporation system for recycling alkali metals by graded concentration of waste liquid, comprising a waste liquid storage tank, a delivery pump, three evaporators, an incinerator, a waste heat boiler, an induced draft fan and a treatment tower, wherein a filter box connected to an air inlet is provided on one side of the treatment tower, three filter screens 1 are detachably installed in the filter box, a filter screen 2 is provided below the air inlet in the waste liquid storage tank, a treatment mechanism is provided in the treatment tower, an anti-blocking mechanism is provided on one side of the filter box, and the anti-blocking mechanism is connected to the treatment mechanism, the treatment mechanism comprises a smoke hood, and the smoke hood is fixedly installed in the treatment tower, a spray rack is rotatably installed in the treatment tower, and a protective shell is rotatably provided on the outer side of the upper end of the spray rack, a bevel gear 1 is provided on the upper end of the spray rack in the protective shell, a rotating shaft is rotatably installed on one side of the smoke hood, and one end of the rotating shaft is connected to a bevel gear 2 meshing with the bevel gear 1 in the protective shell, and one end of the rotating shaft is connected to a motor outside the treatment tower.

[0007] Furthermore, the processing mechanism also includes a partition, and three partitions are provided. Multiple partitions are arranged above the smoke hood, and a through hole is opened on one side of the top of the partition. The lower partition is connected with the smoke hood through a conduit. A plurality of reflux grooves are opened at the bottom of the two upper partitions, and a plurality of guide plates are provided at the bottom of the two upper partitions, and the guide plates are arranged between the openings at both ends of the reflux grooves. A spray pipe is provided between adjacent guide plates. The motor is connected to the processing tower through a mounting frame. A crankshaft is rotatably installed on one side of the processing tower, and a bevel gear three is connected to the upper end of the crankshaft. A bevel gear four meshing with the bevel gear three is sleeved on the outer side of one end of the rotating shaft. A connecting piece is movably connected to the concave part of the crankshaft. A water tank is provided on one side of the bottom surface of the processing tower, and a pump barrel is embedded and installed on one side of the water tank, and a piston is provided in the pump barrel , push rods are connected to both sides of the piston, one end of the push rod on the right side is hinged with the connecting piece, channels are installed at corresponding positions of the upper and lower walls of both ends of the pump barrel, a sealing seat is provided in the channel, a sealing plate is hinged above the sealing seat, the top surface of the sealing plate is fixedly connected to the inner wall of the channel through a spring, and one end of the channel on the upper right side is connected to the outside of the treatment tower through a connecting pipe with a shunt pipe, and the shunt pipes are respectively connected to the spray pipe and the spray rack, and the shunt pipe is rotatably connected to the spray rack. The setting of the treatment mechanism can drive the spray rack to rotate evenly to spray water and spray liquid to contact the flue gas for treatment, and at the same time, it will also prolong the residence time of the flue gas between the partitions so as to better contact and react with the spray liquid. At the same time, the power source that drives the spray rack to rotate will also continuously drive the spray liquid and water to be transported, which plays the role of a pump, reduces energy consumption, and is easy to use.

[0008] Furthermore, the anti-blocking mechanism includes a collection box, and the collection box can be detachably installed at the bottom of the filter box, a plurality of through grooves are opened at the bottom of the filter box, and the through grooves are located on the left side of the filter screen, and a plurality of baffles are fixedly installed in the collection box at the bottom of the filter box, one end of the push rod on the left side is connected to a slide rail outside the treatment tower, a slider is slidably installed in the slide rail, and a connecting rod is rotatably connected to the top of the slider, and two reciprocating screw rods are rotatably installed in the filter box, and the reciprocating screw rods are located between two adjacent filter screens, the upper end of the reciprocating screw rod is sleeved with a sprocket above the filter box, and the two sprocket wheels are connected by a chain, and the lower end of the reciprocating screw rod on the left side is connected to the filter screen by a chain. It runs through the collecting box and is fixedly connected to one end of the connecting rod. A matching sleeve on the outer side of the reciprocating screw is provided with a movably connected cleaning brush, and the cleaning brush is located in the filter box. The cleaning brush is a hollow structure, and a plurality of nozzles are provided on the left side of the connecting rod. The channel on the upper left side is connected with the two cleaning brushes respectively through a Y-shaped tube. A one-way valve assembly is connected to one side of the bottom of the collecting box, and the one-way valve assembly is connected to the water tank through a reflux pipe. An anti-blocking mechanism is provided, which can be connected to a push rod on one side, thereby linking with the processing mechanism to continuously drive the reciprocating screw to rotate and drive the cleaning brush to clean the filter screen, and flush it with the delivered water to avoid the two filter screens on the left being blocked and affecting the filtering effect.

[0009] Furthermore, the one-way valve assembly includes a valve seat, and the upper end of the valve seat is threadedly connected to the collecting box, a filter screen three is provided in the opening of the upper end of the valve seat, a reset box is fixedly installed in the valve seat, a fixed block is provided in the reset box, and a support rod is connected to the bottom of the fixed block, a spring two is sleeved on the outer side of the support rod, a fixing ring is fixedly installed below the reset box in the valve seat, and a sealing block is connected to the bottom of the fixing ring at the lower end of the support rod. The setting of the one-way valve assembly can gradually increase the amount of water in the collecting box, thereby utilizing its gravity to push the sealing block to separate from the fixing ring, so that the water in the collecting box can flow back to the water tank for recycling, saving water resources, and maintaining the amount of water in the collecting box to prevent smoke from passing through the collecting box.

[0010] Furthermore, the cross-section of the inner wall of the sealing seat is T-shaped, a sealing gasket is provided on a side of the sealing plate close to the sealing seat, and a sealing ring is provided on the outer side of the piston to match the sealing plate and improve the sealing between the sealing seat and the sealing plate.

[0011] Furthermore, the top surfaces of the partitions are all inclined surfaces, the openings on several of the partitions are staggered left and right, the guide plates are inclined, and the reflux grooves are U-shaped to guide the spray liquid. The setting of the reflux grooves can allow part of the smoke to reflux and impact the mainstream smoke, thereby decelerating it and prolonging its residence time.

[0012] Furthermore, the filtering levels of the plurality of filter screens increase from left to right, both ends of the cleaning brush are in contact with the inner wall of the filter box, and the plurality of nozzles are arranged to be tilted downward to limit and guide the cleaning brush.

[0013] Furthermore, the two ends of the second spring are fixedly connected to the fixed block and the inner wall of the reset box respectively, the top surface of the sealing block is provided with a sealing ring, and the lower end of the valve seat is rotatably connected to the return pipe to improve the sealing between the sealing block and the fixed ring.

[0014] Furthermore, the spray rack is composed of a circular ring tube, a plurality of vertical tubes and cross-shaped branch tubes, and the inner wall of the smoke collecting hood is provided with an annular groove adapted to the spray rack to assist in supporting the spray rack and make its rotation more stable.

[0015] Furthermore, a water inlet connected to the water tank is provided on one side of the treatment tower, and a sealing cover is provided at one end of the water inlet. The water inlet is located above the reflux pipe so as to add water to the water tank.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention can realize the operation of two mechanisms driven by a single power source through the arrangement of the treatment mechanism and the anti-blocking mechanism, and can drive the spray frame to rotate to evenly spray the spray liquid to contact the flue gas. At the same time, when the flue gas passes between the partitions, under the action of the reflux groove and the guide plate, part of the flue gas will flow back to impact the mainstream flue gas, thereby decelerating it and prolonging the retention time of the flue gas, so that it can fully contact and react with the spray liquid, thereby improving the treatment effect of the flue gas. The crankshaft and the motor will drive the piston to move in linkage, so as to drive the spray liquid entering the pump barrel to continuously transport it to the spray frame and the spray pipe. At the same time, it will also drive the driving slider to drive the connecting rod, and then drive the connected reciprocating screw to rotate, thereby driving the cleaning brush to clean the filter screen, and cooperate with the delivered water to flush it, thereby improving the cleaning effect, avoiding the filter screen from being blocked and affecting the filtering effect, being more convenient to use, and reducing energy consumption.

[0018] 2. The present invention can gradually accumulate water in the collection box through the one-way valve assembly, so that its gravity pushes the sealing block to drive the support rod to pull the fixed block to squeeze the second spring, so that the sealing block and the fixed ring are separated, and the water in the collection box can flow through the valve seat and the reflux pipe, and then flow back to the water tank, so as to recycle the water and save water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the treatment tower structure of the present invention;

[0021] Figure 3 It is a partial rear view structural schematic diagram of the treatment tower of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the connecting member and the crankshaft of the present invention;

[0023] Figure 5 It is a schematic diagram of the enlarged structure between the channel and the sealing seat of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure between the slide rail and the connecting rod of the present invention;

[0025] Figure 7 It is a schematic structural diagram of a cleaning brush of the present invention.

[0026] Figure 8 The present invention Figure 2 A is a schematic diagram of the enlarged structure of the middle part;

[0027] Fig. 9 The present invention Figure 2 Schematic diagram of the enlarged structure of B.

[0028] Fig.10 The present invention Figure 2 Schematic diagram of the enlarged structure of C;

[0029] Fig.11 It is a partial structural schematic diagram of the spray rack of the present invention.

[0030] Numbers in the figure: 1. Waste liquid storage tank; 2. Evaporator; 3. Incinerator; 4. Waste heat boiler; 5. Treatment tower; 6. Filter box; 7. Filter screen 1; 8. Smoke hood; 9. Spray rack; 10. Bevel gear 1; 11. Bevel gear 2; 12. Rotating shaft; 13. Motor; 14. Partition; 15. Guide plate; 16. Connector; 17. Spray pipe; 18. Crankshaft; 19. Bevel gear 3; 20. Bevel gear 4; 21. Water tank; 22. Pump Cylinder; 23, push rod; 24, piston; 25, channel; 26, sealing seat; 27, sealing plate; 28, spring one; 29, slide rail; 30, slider; 31, connecting rod; 32, reciprocating screw rod; 33, collecting box; 34, baffle; 35, sprocket; 36, chain; 37, cleaning brush; 38, valve seat; 39, reset box; 40, fixed block; 41, support rod; 42, spring two; 43, fixed ring; 44, sealing block. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example: Figure 1 - Fig.11As shown, the present invention provides a technical solution: a multi-effect evaporation system for recycling alkali metals by graded concentration of waste liquid, comprising a waste liquid storage tank 1, a delivery pump, three evaporators 2, an incinerator 3, a waste heat boiler 4, an induced draft fan and a treatment tower 5, a filter box 6 connected to an air inlet is provided on one side of the treatment tower 5, three filter screens 7 are detachably installed in the filter box 6, a filter screen 2 is provided below the air inlet in the waste liquid storage tank 1, a treatment mechanism is provided in the treatment tower 5, an anti-blocking mechanism is provided on one side of the filter box 6, and the anti-blocking mechanism The structure is connected with the processing mechanism, which includes a smoke collecting hood 8, and the smoke collecting hood 8 is fixedly installed in the processing tower 5. A spray rack 9 is rotatably installed in the processing tower 5, and a protective shell is rotatably sleeved on the outer side of the upper end of the spray rack 9, and a bevel gear 10 is sleeved on the upper end of the spray rack 9 in the protective shell. A rotating shaft 12 is rotatably installed on one side of the smoke collecting hood 8, and one end of the rotating shaft 12 is connected to a bevel gear 2 11 meshing with the bevel gear 10 in the protective shell, and one end of the rotating shaft 12 is connected to a motor 13 outside the processing tower 5. In this example, the processing mechanism also includes a partition 14, and there are three partitions 14. Multiple partitions 14 are arranged above the smoke hood 8, and a through hole is opened on one side of the top of the partition 14. The lower partition 14 is connected to the smoke hood 8 through a conduit. A plurality of reflux grooves are opened at the bottom of the two upper partitions 14, and a plurality of guide plates 15 are opened at the bottom of the two upper partitions 14, and the guide plates 15 are arranged between the openings at both ends of the reflux grooves. A spray pipe 17 is arranged between adjacent guide plates 15. The motor 13 is connected to the processing tower 5 through a mounting frame. A crankshaft 18 is rotatably installed on one side of the processing tower 5, and a bevel gear three 19 is connected to the upper end of the crankshaft 18. A bevel gear four 20 meshing with the bevel gear three 19 is sleeved on the outer side of one end of the rotating shaft 12. A connecting piece 16 is movably connected to the concave part of the crankshaft 18. A water tank 21 is provided on one side of the inner bottom surface of the processing tower 5, and a pump barrel 22 is embedded and installed on one side of the water tank 21. A movable Plug 24, both sides of piston 24 are connected with push rods 23, one end of the right push rod 23 is hinged with the connecting piece 16, and channels 25 are installed at the corresponding positions of the upper and lower walls at both ends of the pump barrel 22. A sealing seat 26 is provided in the channel 25, and a sealing plate 27 is hinged above the sealing seat 26. The top surface of the sealing plate 27 is fixedly connected to the inner wall of the channel 25 through a spring 28. One end of the upper channel 25 on the right side is connected to a shunt pipe outside the treatment tower 5 through a connecting pipe, and the shunt pipe is respectively connected to the spray pipe 17 and the spray rack 9, and the shunt pipe is rotatably connected to the spray rack 9. The setting of the treatment mechanism can drive the spray rack 9 to rotate evenly to spray water and spray liquid to contact the flue gas for treatment, and at the same time, it will also prolong the residence time of the flue gas between the partitions 14 so that it can better contact and react with the spray liquid. At the same time, the power source that drives the spray rack 9 to rotate will also continuously drive the spray liquid and water to be transported, which plays the role of a pump, reduces energy consumption, and is easy to use.

[0033] In this example, the cross section of the inner wall of the sealing seat 26 is T-shaped, a sealing gasket is provided on the side of the sealing plate 27 close to the sealing seat 26, and a sealing ring is sleeved on the outer side of the piston 24 to match the sealing plate 27, thereby improving the sealing performance between the sealing seat 26 and the sealing plate 27. In this example, the top surfaces of the partitions 14 are all inclined surfaces, and the openings on the partitions 14 are staggered and distributed left and right. The guide plate 15 is inclined, and the reflux groove is U-shaped to guide the spray liquid. The setting of the reflux groove can make part of the smoke reflux and impact the mainstream smoke, thereby decelerating it and prolonging its retention time. In this example, the spray rack 9 is composed of a circular tube, a plurality of vertical tubes and a cross-shaped branch pipe. The inner wall of the smoke hood 8 is provided with an annular groove that matches the spray rack 9 to support and assist the spray rack 9 and make its rotation more stable. In this example, a water inlet connected to the water tank 21 is provided on one side of the treatment tower 5 , and a sealing cover is provided at one end of the water inlet. The water inlet is located above the reflux pipe so as to add water into the water tank 21 .

[0034] The specific implementation method is as follows: when in use, the flue gas generated will be introduced into the treatment tower 5 through the filter box 6 for treatment and then discharged. When the flue gas passes through the filter box 6, it will be filtered by the filter screen 7 and then enter the treatment tower 5. At the same time, the motor 13 is turned on to drive the rotating shaft 12 to rotate, so that the rotating shaft 12 drives the bevel gear 2 11 to drive the meshing bevel gear 10 to drive the spray rack 9 to rotate. At the same time, the rotating shaft 12 will also drive the bevel gear 4 20 to drive the meshing bevel gear 3 19 to drive the crankshaft 18 to rotate, so that the crankshaft 18 drives the connecting piece 16 to drive the connected push rod 23 to drive the piston 24 to reciprocate left and right in the pump barrel 22. When the pump barrel 22 moves to the left, the pressure on the right side of the pump barrel 22 decreases, so that under the action of the pressure difference, the sealing plate 27 in the channel 25 at the lower right side is flipped, so that the spray liquid enters the pump barrel 22. At the same time, the pressure on the left side of the pump barrel 22 increases, so that the sealing plate 27 in the upper left channel 25 opens, and when the piston 24 moves to the right, the sealing plate 27 at the lower right side is closed, and the sealing plate 27 at the upper right side is opened. At the same time, the sealing plate 27 at the upper left side is closed, and the sealing plate 27 at the lower left side is opened, so that the spray liquid is discharged and transported to the spray pipe 17 and the spray rack 9 for spraying, and the rotation of the spray rack 9 makes the spray liquid sprayed evenly so as to better contact and react with the flue gas. At the same time, the flue gas passing through the smoke hood 8 will enter between the partitions 14, so that part of the flue gas will enter the reflux groove and then flow back to between the partitions 14, so that the flue gas passing through the reflux groove impacts the flue gas between the partitions 14, so that its flow rate is reduced and its residence time is prolonged, so that it can fully contact and react with the spray liquid, thereby improving the treatment effect of the flue gas.

[0035] In this embodiment, the anti-blocking mechanism includes a collecting box 33, and the collecting box 33 is detachably installed at the bottom of the filter box 6. A plurality of through grooves are opened at the bottom of the filter box 6, and the through grooves are located on the left side of the filter screen 7. A plurality of baffles 34 are fixedly installed in the collecting box 33 at the bottom of the filter box 6. One end of the left push rod 23 is connected to a slide rail 29 outside the processing tower 5. A slider 30 is slidably installed in the slide rail 29. A connecting rod 31 is rotatably connected to the top of the slider 30. Two reciprocating screw rods 32 are rotatably installed in the filter box 6, and the reciprocating screw rods 32 are located between two adjacent filter screens 7. A sprocket 35 is sleeved on the upper end of the reciprocating screw rod 32 above the filter box 6. The two sprocket wheels 35 are connected by a chain 36. The lower end of the left reciprocating screw rod 32 is connected to the filter screen 7 by a chain 36. It passes through the collecting box 33 and is fixedly connected to one end of the connecting rod 31. A matching sleeve is provided on the outer side of the reciprocating screw rod 32 with a movably connected cleaning brush 37, and the cleaning brush 37 is located in the filter box 6. The cleaning brush 37 is a hollow structure, and a plurality of nozzles are provided on the left side of the connecting rod 31. The upper channel 25 on the left side is connected with the two cleaning brushes 37 through a Y-shaped tube, and a one-way valve assembly is connected to one side of the bottom of the collecting box 33. The one-way valve assembly is connected to the water tank 21 through a reflux pipe. An anti-blocking mechanism is provided, which can be connected to a push rod 23 on one side, so as to be linked with the processing mechanism to continuously drive the reciprocating screw rod 32 to rotate and drive the cleaning brush 37 to clean the filter screen 7, and flush it with the delivered water to avoid the two filter screens 7 on the left side from being blocked and affecting the filtering effect. In this example, the one-way valve assembly includes a valve seat 38, and the upper end of the valve seat 38 is threadedly connected to the collection box 33, a filter screen three is provided in the opening of the upper end of the valve seat 38, a reset box 39 is fixedly installed in the valve seat 38, a fixed block 40 is provided in the reset box 39, and a support rod 41 is connected to the bottom of the fixed block 40, a spring two 42 is sleeved on the outer side of the support rod 41, a fixing ring 43 is fixedly installed below the reset box 39 in the valve seat 38, and a sealing block 44 is connected to the bottom of the fixing ring 43 at the lower end of the support rod 41. The setting of the one-way valve assembly can gradually increase the water volume in the collection box 33, so that the sealing block 44 is separated from the fixing ring 43 by its gravity, so that the water in the collection box 33 can be returned to the water tank 21 for recycling, saving water resources, and maintaining the water volume in the collection box 33 to prevent smoke from passing through the collection box 33.

[0036] In this example, the filtering levels of the plurality of filter screens 7 increase from left to right, both ends of the cleaning brush 37 are in contact with the inner wall of the filter box 6, and the plurality of nozzles are arranged to be tilted downward to limit and guide the cleaning brush 37. In this example, both ends of the spring 2 42 are respectively fixedly connected to the inner wall of the fixing block 40 and the reset box 39, a sealing ring is provided on the top surface of the sealing block 44, and the lower end of the valve seat 38 is rotatably connected to the return pipe to improve the sealing performance between the sealing block 44 and the fixing ring 43.

[0037] The specific implementation method is as follows: under the transmission drive of the motor 13 in the processing mechanism, the piston 24 moves and the push rod 23 on the left moves synchronously, so that the push rod 23 drives the slide rail 29, and then drives the slider 30 to slide in the slide rail 29, and at the same time the slider 30 drives the connecting rod 31 and then drives the reciprocating screw 32 connected thereto to rotate, and at the same time the reciprocating screw 32 on the left drives another reciprocating screw 32 to rotate synchronously through the sprocket 35 and the chain 36, and the rotation of the reciprocating screw 32 drives the cleaning brush 37 to reciprocate up and down, so that the bristles on the cleaning brush 37 clean the filter screen 7 on the left, and at the same time the piston 24 pushes the water entering the pump barrel 22 on the left side to the cleaning brush 37, and through The nozzle sprays water to flush the filter 7, improving the cleaning effect thereof, thereby preventing it from being blocked and affecting the filtering effect, and the cleaned dust and the like fall into the collection box 33. As the amount of water collected in the collection box 33 by the nozzle sprays water, it gradually increases, which increases the force on the sealing block 44, thereby pushing the sealing block 44 to drive the support rod 41 to pull the fixing block 40 to squeeze the spring 2 42, thereby separating the sealing block 44 from the fixing ring 43, thereby discharging the water back into the water tank 21 for recycling and reuse, reducing resource waste, and at the same time keeping the water in the collection box 33 within a suitable range, thereby preventing the smoke from passing through the collection box 33 without being filtered by the two front filters 7, thereby reducing the filtering effect, and making it more convenient to use.

[0038] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A multiple-effect evaporation system for waste liquid classification concentration and recovery of alkali metals, comprising a waste liquid storage tank (1), a delivery pump, three evaporators (2), an incinerator (3), a waste heat boiler (4), an induced draft fan and a treatment tower (5), characterized in that: A filter box (6) connected to the air inlet is provided on one side of the treatment tower (5), and three filter screens (7) are detachably installed in the filter box (6). A filter screen (2) is provided below the air inlet in the waste liquid storage tank (1). A treatment mechanism is provided in the treatment tower (5), and an anti-blocking mechanism is provided on one side of the filter box (6), and the anti-blocking mechanism is connected to the treatment mechanism. The treatment mechanism includes a smoke hood (8), and the smoke hood (8) is fixedly installed in the treatment tower (5). A spray rack (9) is rotatably mounted in the treatment tower (5), and a protective shell is rotatably mounted on the outer side of the upper end of the spray rack (9). A bevel gear 1 (10) is mounted on the upper end of the spray rack (9) in the protective shell. A rotating shaft (12) is rotatably mounted on one side of the smoke collecting hood (8), and one end of the rotating shaft (12) is connected to a bevel gear 2 (11) meshing with the bevel gear 1 (10) in the protective shell. One end of the rotating shaft (12) is connected to a motor (13) outside the treatment tower (5).

2. A multiple-effect evaporation system for waste liquid graded concentration and alkali metal recovery according to claim 1, characterized in that: The processing mechanism further comprises a partition (14), and three partitions (14) are provided. The plurality of partitions (14) are arranged above the smoke hood (8), and a through opening is provided on one side of the top of the partition (14). The lower partition (14) is connected to the smoke hood (8) through a conduit. The bottoms of the two upper partitions (14) are provided with a plurality of reflow grooves, and the bottoms of the two upper partitions (14) are provided with a plurality of guide plates (15), and the guide plates (15) are arranged between the openings at both ends of the reflow grooves. A spray pipe (17) is provided between adjacent guide plates (15). The motor (13) is connected to the processing tower (5) through a mounting frame. A crankshaft (18) is rotatably installed on one side of the processing tower (5), and a bevel gear three (19) is connected to the upper end of the crankshaft (18). A bevel gear four (20) meshing with the bevel gear three (19) is sleeved on the outer side of one end of the rotating shaft (12). The crankshaft (18) is recessed. A connecting piece (16) is movably connected at the shape of the connecting piece (16); a water tank (21) is provided on one side of the inner bottom surface of the treatment tower (5); a pump barrel (22) is embedded and installed on one side of the water tank (21); a piston (24) is provided in the pump barrel (22); push rods (23) are connected to both sides of the piston (24); one end of the push rod (23) on the right side is hinged to the connecting piece (16); channels (25) are installed at corresponding positions of the upper and lower walls of both ends of the pump barrel (22); a sealing seat (26) is provided in the channel (25); a sealing plate (27) is hinged above the sealing seat (26); the top surface of the sealing plate (27) is fixedly connected to the inner wall of the channel (25) through a spring (28); one end of the channel (25) on the right side is connected to a shunt pipe outside the treatment tower (5) through a connecting pipe, and the shunt pipe is respectively connected to the spray pipe (17) and the spray rack (9), and the shunt pipe is rotatably connected to the spray rack (9).

3. A multiple-effect evaporation system for waste liquid graded concentration and recovery of alkali metals according to claim 2, characterized in that: The anti-blocking mechanism comprises a collecting box (33), and the collecting box (33) is detachably mounted on the bottom of the filter box (6). The bottom of the filter box (6) is provided with a plurality of through slots, and the through slots are located on the left side of the filter screen (7). The bottom of the filter box (6) is provided with a plurality of baffles (34) fixedly mounted in the collecting box (33). One end of the push rod (23) on the left side is connected to a slide rail (29) outside the treatment tower (5). A slider (30) is slidably mounted in the slide rail (29). The top of the slider (30) is rotatably connected to a connecting rod (31). Two reciprocating screw rods (32) are rotatably mounted in the filter box (6), and the reciprocating screw rods (32) are located between two adjacent filter screens (7). The reciprocating screw rods (32) are rotatably mounted in the filter box (6). A sprocket (35) is sleeved on the upper end above the filter box (6), and the two sprockets (35) are connected by a chain (36). The lower end of the reciprocating screw rod (32) on the left side passes through the collection box (33) and is fixedly connected to one end of the connecting rod (31). A movably connected cleaning brush (37) is sleeved on the outer side of the reciprocating screw rod (32), and the cleaning brush (37) is located in the filter box (6). The cleaning brush (37) is a hollow structure, and a plurality of nozzles are provided on the left side of the connecting rod (31). The channel (25) on the upper left side is respectively connected to the two cleaning brushes (37) through a Y-shaped tube. A one-way valve assembly is connected to one side of the bottom of the collection box (33), and the one-way valve assembly is connected to the water tank (21) through a return pipe.

4. A multiple-effect evaporation system for recovering alkali metals by graded concentration of waste liquid according to claim 3, characterized in that: The one-way valve assembly comprises a valve seat (38), and the upper end of the valve seat (38) is threadedly connected to the collecting box (33), a filter screen three is arranged in the opening of the upper end of the valve seat (38), a reset box (39) is fixedly installed in the valve seat (38), a fixing block (40) is arranged in the reset box (39), and a support rod (41) is connected to the bottom of the fixing block (40), a spring two (42) is sleeved on the outer side of the support rod (41), a fixing ring (43) is fixedly installed below the reset box (39) in the valve seat (38), and a sealing block (44) is connected to the bottom of the fixing ring (43) at the lower end of the support rod (41).

5. A multiple-effect evaporation system for waste liquid graded concentration and alkali metal recovery according to claim 2, characterized in that: The cross section of the inner wall of the sealing seat (26) is T-shaped, a sealing gasket is provided on a side of the sealing plate (27) close to the sealing seat (26), and a rear sealing ring is sleeved on the outer side of the piston (24).

6. A multiple-effect evaporation system for waste liquid graded concentration and alkali metal recovery according to claim 2, characterized in that: The top surfaces of the partitions (14) are all inclined surfaces, a number of openings on the partitions (14) are staggered and distributed left and right, the guide plates (15) are inclined, and the reflow grooves are U-shaped.

7. A multiple-effect evaporation system for waste liquid graded concentration and alkali metal recovery according to claim 3, characterized in that: The filtering levels of the plurality of filter screens (7) increase from left to right, both ends of the cleaning brush (37) are in contact with the inner wall of the filter box (6), and the plurality of nozzles are arranged to be tilted downward.

8. A multiple-effect evaporation system for waste liquid graded concentration and recovery of alkali metals according to claim 4, characterized in that: The two ends of the second spring (42) are respectively fixedly connected to the fixed block (40) and the inner wall of the reset box (39); the top surface of the sealing block (44) is provided with a sealing ring; and the lower end of the valve seat (38) is rotatably connected to the return pipe.

9. The multiple-effect evaporation system for recovering alkali metals by graded concentration of waste liquid according to claim 1, characterized in that: The spray rack (9) is composed of a circular ring-shaped pipe, a plurality of vertical pipes and cross-shaped branch pipes, and the inner wall of the smoke collecting hood (8) is provided with an annular groove adapted to the spray rack (9).

10. The multiple-effect evaporation system for recovering alkali metals by graded concentration of waste liquid according to claim 2, characterized in that: A water inlet connected to the water tank (21) is provided on one side of the treatment tower (5), and a sealing cover is provided at one end of the water inlet. The water inlet is located above the reflux pipe.

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